<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" 
                    v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area" v-for="(item, key) of cities" 
            :key="key"
            :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom"
                       v-for="innerItem of item"
                       :key="innerItem.id"
                        @click="handleCityClick(innerItem.name)" 
                    >{{innerItem.name}}
                    </div>
                    
                </div>
                
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations} from  'vuex'
export default {
    name: 'CityList',
    props: {
        hot: Array,
        cities: Object,
        letter: String
    },
    computed: {
        ...mapState({
            currentCity: 'city'
        })
    },
    methods: {
        handleCityClick (city) {
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    watch: {
        letter () {
            if (this.letter) {
                const element = this.$refs[this.letter][0]
                this.scroll.scrollToElement(element)
            }
        }
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.wrapper)
    }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color:#ccc
        &:after
            border-color:#ccc
    .border-bottom
        &:before
            border-color:#ccc
    .list
        overflow:hidden
        position:absolute
        top:1.58rem
        left:0
        right:0
        bottom:0
        .title
            line-height:.54rem 
            background:#eee 
            padding-left:.2rem
            color:#666
            font-size:.26rem
        .button-list
            overflow:hidden
            padding:.1rem .6rem .1rem .1rem 

            .button-wrapper
                float:left
                width:33.3%
                .button
                    padding:.1rem
                    margin: .1rem 
                    text-align:center 
                    border: .02rem solid #ccc
                    border-radius:.06rem
        .item-list
            .item
                line-height:.76rem 
                padding-left: .2rem
</style>
